[pb8185]

Guild Wars operates much like Diablos series on Battlenet, when you get a couple people to join your group, you are pretty much running the server for the instance and maybe periodically sending packets to the server, and since it's between 5-10 people, it doesn't require a great connection to accomplish.

Also RPGs and FPSs are very different in terms of how much data gets transmitted. RPGs only have to account for location, skill used, damage taken etc, and does not have to be very accurate, but FPS shooters need to be very accurate and has to constantly transmit location data, aim direction data, projectile data at very high frequencies in order for the fast paced action to be precise.

This is why the cities can hold 5000 people and the battle instances can only hold 200 since while in cities combat data is not neccessary.